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Differential Amplifier - Coggle Diagram

- - - - Resistor
        
        Inductor
        
        Capacitor
        
        Discrete
        
        Construct it as single unit
  - - - Transistor
        
        Diode
        
        Transformer
- - - - Common mode gain should be attenuated
- - - - We can use Vref to determine if LED High or LOW by commparing if Vin is greater or smaller than Vref
  - - - Have to analysis the resistor based on which op-Amp is being asked for
        
        For Led to be ON V(+) > V(-)
  - - - Since the high-power heater operates at a higher voltage and current than the op-amp, which operates at a lower voltage and current, a relay is required for the op-amp output in order to control the heater. The relay is used to link the high-power heater and low-power op-amp output because it requires higher voltage and current.
- - - - Because of high gain, the op-amp at its open loop configuration can only have 3 possible outputs, VCC, VEE and 0V. In this case, the op-amp function like a digital circuit. Thus its applications are limited.
  - - - Non-Inverting
        
        Voltage Follower
        
        Inverting summing amplifier
        
        Non Inverting summing amplifier
        
        The voltage levels at the inverting and non-inverting input terminals are the same (i.e. V+ = V-)
        No current will flow into the terminals due to infinite input impedance.
        
        Summing amplifiers are amplifiers with more than one input.
        These amplifiers can be configured as inverting or non-inverting, depending on which terminal of the op-amp the inputs are connected to.
        
        Consider the resistor values of R1 and R2 for the non-inverting amplifier.
        
        If R1 is infinite and R2 is zero, the non-inverting amplifier will become a Voltage Buffer / Follower.
        
        Voltage Buffer/ Follower has a output voltage which is approximately equal to the input voltage, VOUT ≈ VIN.
        
        VD ≈ 0V due to the negative feedback configuration, thus voltage at both “+” and “-” terminals are the same.
        No current flow ( I = 0A) into the terminals of the op-amp, due to infinite input resistance.
      - VD ≈ 0V due to the negative feedback configuration, thus voltage at both “+” and “-” terminals are the same.
        No current flow ( I = 0A) into the terminals of the op-amp, due to infinite input resistance.
    - - Positive feedback
        
        The Output (VOUT) terminal is connected to the Non-Inverting (V+) terminal.
      - The Output (VOUT) terminal is connected to the Inverting (V-) terminal.
      - The output signal (VOUT) is applied back to the inverting input (V-) terminal. Hence, the overall gain of the circuit is determined by the feedback network rather than the op-amp characteristics.
        The voltage difference of the input terminals, 𝑽𝑫→𝟎 (or 𝑽+≈𝑽_−).